Anatomy Chapter 1 Test Flashcards
State the body structures from smallest to largest
Atom, Molecule, Macromolecule, Organelle, Cell, Tissue, Organ, Organ System, Organism
small structures within a cell that carry out specific functions to keep the cell in homeostasis
organelles
basic unit of structure and function of the body, smallest living structure
cell
groups of cells similar in structure and function
tissue
structure composed or two or more types of tissues that has a specialized function
organ
sum of all the chemical reactions that take place in the body at a given point in time
metabolism
Change in position of the body or of a body part; motion of an internal organ
movement
reaction to a change inside or outside the body
responsiveness
increase in body size without changing shape
growth
production of new organisms and new cells
reproduction
obtaining oxygen, removing carbon dioxide, and releasing energy from foods (some forms of life do not use oxygen in this characteristic of life)
respiration (KNOW FORMULA**)
Breakdown of food substances into simpler forms that can be absorbed and used
digestion
passage of substances through membranes and into body fluids
absorption
movement of substances in body fluids
circulation
changing absorbed substances into chemically different forms
assimilation
removal of wastes produced by metabolic reactions
excretion
What are the five requirements of an organism? (for Life)
water, food, oxygen, heat, pressure
What is homeostasis?
Having a stable internal environment which is needed for all of the body’s processes.
Is the body ever in perfect homeostasis everywhere?
no
Where is the extracellular/intercellular fluid found?
Between cells containing water, nutrients, and oxygen
nerves in the body that detect specific stimuli (conditions) in the body’s internal environment and send that information to central nervous system (CNS)
receptors
specific value for a process that takes place in the body
set point
what happens when body temperature gets out of homeostasis?
Body temperature regulation is maintained by homeostatic mechanisms. The set point tells what the value should be. When body temperature becomes too high, thermoreceptors send signals to the control center. The hypothalamus detects deviation from the set point and signal effector organs. The skin blood vessels dilate, which increase skin blood flow, and sudoiferous glands secrete. Body heat is lost to surroundings. When body temperature becomes too low, thermoreceptors send signals to the control center. The hypothalamus detects deviation from the set point and signal effector organs. Skin blood vessels constrict, which decrease skin blood flow, and sudoiferous glands remain inactive. If body temperature continues to drop, the control center signals muscles to contract involuntarily, and the muscle activity generates heat. Body heat is conserved.
hormone produced by pituitary glands that stimulates uterine contractions
oxytocin
What is a body cavity?
open spaces in the human body filled with organs and other structures so the spaces are not normally empty
What are the two main body cavities?
Dorsal and Ventral
What are the two subdivisions of the two main body cavities (dorsal and ventral)?
Cranial and Vertebral
How many structures are in the cranial cavity?
3
What are the three structures in the cranial cavity?
Brain, Pituitary gland, Hypothalamus
How many structures are in the vertebral cavity?
1
What is/are the structure in the vertebral cavity?
Spinal cord
What are the three subdivisions of the ventral cavity?
Thoracic, Abdominal, Pelvic
What are the three subdivisions of the thoracic cavity?
2 pleural cavities and mediastinum
How many structures are in the thoracic cavity?
7
What are the seven structures in the thoracic cavity?
lungs, heart, trachea, esophagus, bronchi, bronchioles, alveoli
How many structures are in the abdominal cavity?
10
What are the structures in the abdominal cavity?
liver, gallbladder, stomach, spleen, adrenal gland, large and small intestines, pancreas, kidneys, ureters
How many structures are in the pelvic cavity?
4
What are the structures in the pelvic cavity?
urinary bladder, rectum, testes, ovaries
area that separates the thoracic cavity into different regions
mediastinum
How many structures are in the mediastinum?
4
What are the structures in the mediastinum?
heart, trachea, thymus, esophagus
What are some examples of smaller cavities?
oral, nasal, orbital, middle ear
internal organs of the body, especially in the thoracic and abdominal cavities
viscera
examples of visceral organs
stomach, lungs, heart, liver, kidneys
How many membranes are there?
4
What are the four membranes?
parietal, visceral, peritoneal, pericardial
do the parietal and visceral membranes touch?
no
prefix for lining around
peri
what is the difference between parietal and visceral membranes?
parietal are attached to the wall of a cavity, visceral are deeper and cover internal organs
What directly covers each lung?
Viscera pleura
What covers the heart and does it cover it directly?
Pericardial, no
what is the lining membrane in the abdominalpelvic cavity called?
peritoneal membranes
4 types of membranes
serous, mucous, synovial, cutaneous
Serous membranes…
doesn’t open to the outside environment
Examples of serous membranes
pleura, pericardium, peritoneum
How many bones are in the skull
22
how many bones in the hyoid
1
how many bones in the vertebral column
26
how many bones in the shoulder
2-4
how many bones in the ribcage
25
how many bones in the arms
30-60
how many hip bones
2